LandOfFree - US Patents - Listing for Telephonic communications,Substation or terminal circuitry,For loudspeaking terminal

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Half duplex device and signal processing method thereof

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

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Hands-free communication unit having residual acoustic echo supp

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Hands-free device for use with a cellular telephone in a car to

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Hands-free telephone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Hands-free telephone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Handset proximity muting

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

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Handsfree communication apparatus

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Handsfree radiotelephone having dynamic path attenuation control

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Headset interface

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

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Headset/hand-free operating mode selecting and switching...

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Reexamination Certificate

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Histogram-based processing of audio signals

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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Howling canceller

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Patent

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